.video {
  height: 70%;
  width: 80%;
  margin: 0 auto;
}
.video video {
  display: block;
  height: 100%;
  width: 100%;
}
.background_1 {
  height: 100%;
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  background: url("../images/background.png");
  overflow: hidden;
}
.top {
  height: 100px;
  width: 100%;
  margin: 0 auto;
  margin-top: 40px;
  position: relative;
}
.top .title {
  height: 100%;
  font-size: 5em;
  color: #fff;
  display: inline-block;
  width: 100%;
  text-align: center;
}
.top .hint {
  position: absolute;
  top: 10px;
  left: 196px;
  display: none;
}
.top .log {
  opacity: 0;
  height: 100%;
  width: 80px;
  display: inline-block;
  position: absolute;
  top: 0;
  left: 100px;
}
.top .log img {
  height: 100px;
}
.ctrl {
  position: absolute;
  bottom: -290px;
  left: 150px;
  height: 300px;
  width: 200px;
}
.ctrl .about {
  cursor: pointer;
  height: 50px;
  background: #000;
  color: #fff;
  width: 100px;
  text-align: center;
  line-height: 50px;
  margin-top: 10px;
}
.ctrl .about:hover {
  background: #FFC926;
}
.ctrl .second {
  width: 120px;
}
.ctrl .fourth {
  width: 150px;
}
.ctrl .music {
  width: 100%;
  height: 50px;
  color: #fff;
  line-height: 50px;
}
.ctrl i {
  cursor: pointer;
  height: 36px;
  width: 36px;
  margin-right: 6px;
  line-height: 36px;
  text-align: center;
  background: #000;
  display: inline-block;
  font-size: 26px;
  vertical-align: middle;
}
.ctrl .audio img {
  vertical-align: top;
}
.first_1 {
  position: absolute;
  top: 40px;
  left: -400px;
  height: 80%;
  width: 400px;
  background: #FFC926;
}
